It is the high medieval monument with the most conflicting dating. Initially it was thought to be a Visigothic church upon a previous Early Christian settlement, but there are too many details in its structure that raise doubts with regard to the origin of the different elements that have reached until now. The structure of the central square is a very interesting one, not only for being atypical, but also for its very original design and the pleasant visual impact it provokes, with an opening to the chevet, two to each side of the crossing and three to the central nave. Its communication with the apse was by means of a triumphal horse shoe arch, upon two magnificent imposts that had a part wider, inlaid in the wall with vegetal decoration, and another one narrower where the column with capital leaned, now disappeared. At each side of the crossing there were two stilted arches that set in the walls upon decorated imposts, that joined upon a central column, whereas between the central and the crossing nave there is a wall where three spans open producing a separation between both, similar to the one we frequently find in Asturian churches, like San Julián de Los Prados; a rounded stilted arch upon The shape of the access doors is very surprising, one at the end of the central nave and the other one at the left side, rectangular, with lintel and semicircular relieving arch, in the most pure Asturian style.
The analysis of San Giao is a very controversial one. The first sensation it produces, both internally and externally, is that of an Asturian church, since the separation wall between the central and the crossing naves is one of the most meaningful characteristics, and with a high visual impact, of the Asturian art in times of Alphonse the Second. Adding to that the similarity of the entrance doors, >with lintel and relieving arch, the existence of two round stilted arches and the nartex' with a raised gallery. However, the distribution of the chevet, as well as the entrance arch and a great part of the decoration found, are clearly Visigothic of the 7th century. | |||||
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Therefore, the first possibility to bear in mind is that it is a Visigothic church of the 7th century, that was brought down by the Arabs, except the chevet and rests of decoration, and rebuilt in Asturian style two centuries later. The problem is that it does not look at all probable that the Christians could have built a monastery in Nazaré around the year 900, since according to what is known so far, It is also very difficult to put forward the possibility that all the building that has reached until now was 7th century Visigothic, because in that case we should accept the idea that in Visigothic architecture of that period, besides the cruciform churches that we know, the direct precedent of the churches of the first Asturian art was being cretaed, with a separation wall between the nave and the chevet, gallery and, even more difficult to believe, the round arch was being utilized again. Nevertheless, before giving up this possibility completely, it is important to consider that, as no rests Therefore, in order to reach a conclusion about the origin of San Giao, it is necessary to wait to know the conclusions of the study and of the restoration that are being accomplished now that, besides, could provide new information about the lesser known areas of High Medieval art in our peninsula.
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